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 * The contents of this file are subject to the terms of either the Universal Permissive License
 * v 1.0 as shown at http://oss.oracle.com/licenses/upl
 *
 * or the following license:
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 * Redistribution and use in source and binary forms, with or without modification, are permitted
 * provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this list of conditions
 * and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided with
 * the distribution.
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package org.openjdk.jmc.rjmx.triggers.fields.internal;

import java.text.DateFormat;
import java.text.ParseException;
import java.text.ParsePosition;
import java.util.Date;

/**
 * Field for holding time values
 */
final public class TimeField extends Field {
	public TimeField(String id, String label, String defaultValue, String description) throws Exception {
		super(id, label, defaultValue, description);
	}

	protected DateFormat getFormat() {
		return DateFormat.getTimeInstance(DateFormat.SHORT);
	}

	@Override
	protected String parsedValue(String value) throws Exception {
		ParsePosition pos = new ParsePosition(0);
		value = value.trim();
		String parsed = getFormat().format(getFormat().parse(value, pos));
		if (pos.getIndex() < value.length()) {
			return null;
		}
		return parsed;
	}

	@Override
	public Date getDateTime() {
		try {
			return getFormat().parse(getValue());
		} catch (ParseException e) {
			// should never happen
		}
		return null;
	}

	@Override
	public int getType() {
		return TIME;
	}

	@Override
	void initDefaultValue(String defaultValue) {
		if (!setValue(defaultValue)) {
			setValue(getFormat().format(new Date()));
		}
	}

}
